I was told by my uncle that they SUCK, they last you only 1-2 years and that if you revv them up to just 70% of their RPM's they bust their valves. I was told by my uncle that he onced towed a stalled mootorcycle with his fairly new "Pulsar" indian-made bike and he busted the engine. Busted the engine just towing another small motorcycle? C'mon.....